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March 24, 1936. v A. KOTTMANN 2,035,322

CALCULATING MACHINE WITH AUTOMATIC MULTIPLYING DEVICE AND WITH RESULT AND TOTALIZING REGISTERS Filed Oct. 24, 1931 4 Sheets-Sheet l E] El IE El E1 46' 4: 47 11 27 -y" lit-:1

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March 24, 1936. A. KOTTMANN 2,035,322

CALCULATING MACHINE WITH AUTOMATIC MULTIPLYING DEVICE AND WITH RESULT AND TOTALIZING' REGISTERS Filed Oct. 24, 1931 4 Sheets-Sheet 2 i-izw 7ATITDRNEY' March 24, 1936. KOTTMANN 2,g35,322

CALCULATING MACHINE WITH AUTOMATIC MULTIPLYING DEVIC AND WITH RESULT AND TOTALIZING REGISTERS Filed Oct. 24, 1931 4 Sheets-Sheet 5 March 24, 1936. A. KOTTMANN 2,035,322

CALCULATING MACHINE WITH AUTOMATIC MULTIPLYING DEVICE AND WITH RESULT AND TOTALIZING REGISTERS Filed 061;. 24, 1931 4 Sheets-Sheet 4 INVENTB AUTD F\NEY.

Patented Mar. 24, 1936 UNITED STATES PATENT OFFICE August Kottmann, Sommerda, Germany, assignor to Rheinisehe Metallwaaren 11nd Maschinenfabrik Sommerda Aktiengesellschaft,

Som-

merda, Germany, a corporation of Germany Application October 24, 1931, Serial No. 570,922 In Germany November 4, 1930 3 Claims.

In known calculating machines having automatic multiplying devices and with result and totalizing registers with a motor driven device for transferring the individual amounts from the result registers to the totalizing registers, it is necessary to actuate a special key, in order to connect the transfer mechanism with the driving motor. In the course of calculation it may occur that the operation of this key, which causes the engagement of the transfer device, is inadvertently omitted, whereby errors then occur.

In the calculating machines in accordance with the invention an arrangement is provided which first connects the drive motor with the transfer mechanism upon depressing the multiplication key, that is, every time that the machine is set into operation for carrying out a multiplication, and only then shifts the connection to the main drive shaft of the calculating machine. The de- 20 vice is put in operation when a relatively large number of multiplications is carried out in uninterrupted succession by means of the machine, and the computed products are transferred in each case into the totalizing register. Thus by 25 this device, each time the machine is set into operation to carry out a calculation, the previously calculated product is first transferred into the totalizing register and the calculating operation is carried out only then. As long as the device of the present invention is in operation, thus the transfer of the previous result into the totalizing register always takes place with certainty before carrying out the new calculating operation.

An exemplary embodiment of the invention is 35 illustrated in the drawings wherein:

Fig. l is a plan view of the registers and the portions of the clearing and transfer mechanism supported in the register carriage, in accordance with the invention;

Fig. 2 is a partly sectional side elevation of the register carriage;

Fig. 3 is a side elevation of the drive mechanism of the clearing and transfer mechanism;

Fig. 4 is a front elevation corresponding to Fig. 46 3;

Fig. 9 is a rear elevation of the device in accordance with Fig. 7;

Figs. 10 to 14 are details of the tens transfer device, namely Figs. 10 and 14 in rear elevations, Figs. 11 and 13 in side elevations, and Fig.'12 in plan view; and

Figs. 15 to 18b are fragmentary top views illustrating cam slots.

After the setting of the two factors into the machine, the motor engaging key I (Figs. 5 and 6) is depressed, whereby the controlling slide 2 is shifted by means of the shaft 3 and the intermediate lever 4, and thus the clutch 5 is engaged and the contact device 6, I is closed, so that the motor 8 will drive the shaft 8a and the differential l3.

Simultaneously the intermediate elements I0 and I l and the locking slide 9 are moved by the extension la of the key I. Said locking slide 9 cooperates with the locking disc 12 of the shaft 15 and the locking disc I! of the hollow shaft l8 of the differential I3 driven by the motor.

In its normal position the slide 9 looks the locking disc I! and the hollow shaft IB. By actuating the motor key I the slide 9 is pushed forward in such manner that its projecting lug 9d engages in a radial slot of the locking disc l2, and the projection 9b is moved out of the radial slot of the locking disc H. The locking disc I! now rotates in the slot 90 of the slide 9. The radial slot illustrated in Fig. 5 upon the front side of the locking disc Ill, and the lug Ha are in fact displaced 90 with respect to one another for in the illustrated position of the locking slide 9, the latter lies in the slot located adjacent the lug Ho. The slot and the lug are shown displaced 90 from one another, in order to show both of them more clearly.

After the shifting of the locking slide 9 the locking disc l2 and the shaft ii of the differential l3 are locked, while on the contrary the looking disc it together with the gear wheel l9 are free and are driven by the differential l3. The motion is transmitted through the spur gear 20 and the bevel gears 2!, 22, to the excentric disc 23.

The excentrio disc 23 in turn, in cooperation with a spring 24 (Fig. 3) sets a lever 25 secured to the register carriage into a reciprocating swinging movement. As will be later described in detail, the lever 25 actuates the zero setting means of the totalizing register. It may also simultaneously move the zero setting means of the rotation or quotient register.

In. the exemplary embodiment illustrated, the

lever 25 is in engagement with the excentric disc 23 only when the register carriage is in the normal position, This is sufficient for completely automatic multiplying calculating machines wherein, on the one hand, the multiplying device is so arranged that multiplications are carried out beginning with the lowest digit of the multiplier, and which on the other hand are provided with an automatic carriage return, which after the completion of each multiplication again returns the carriage into the normal position; for in such machines the register carriage, at the beginning of each multiplication, is located in its normal position.

The product register mechanism 28 (Figs. 1 and 2) supported in the register carriage 55 is driven in known manner by stepped rollers, as described in U. S. Patent No. 1,641,615 of September 6, 1927, through double bevel gears 55. The transfer of motion to the number rolls 5? of the product register is accomplished by means of bevel gears 26, shafts 35, bevel gears 33 and S9 and shafts ib.

Tens setting lugs 35, which are secured to the shafts 35, in case of tens transfer move so-called setting flaps 3B, which in turn so shift the tens shifting wheels 31 that they come into engage- ;product transfer. :I! the pin 50 stands in the ment with the tensshifting lugs (as shown in the above cited patent) of the stepped rollers.

Bevel gears 52 are arranged upon the extension of the shaft 35 beyond the plate ll of the register carriage. The double bevel gears 65 are arranged shiftably, but nonrotatably upon the shafts 48 of the number rolls Mi of the totalizing register 27. If these double bevel gears 35 are brought into engagement with the bevel gear 42, and if thereupon the result register 28 is set to zero, then the amount contained in the result register is transferred into the totalizing register.

The bevel wheels 52 and 45 are broughtout of and into gear by a cam mechanism shown in Figs. 15, 16a, 17a, 17b, 180., and 181), comprising cam slots formed in the barsdS, 58 (Figs. 1, 2, 3, 4, 7). The bar 50 (Fig. 15) has a slot and a-pin 8| secured'ina hole in the bar'and extending backwards from said bar as shown in Fig. 15, and the bands (Fig. 16a.) has two slots 82 and 83, the latter having two branches 83a and 83b. The bars 59, 50 are provided at both ends with slots, as shown in Figs. 15-18b, and are, guided by the pins 5| (Figs. 1, 4, 7) fixed' infthe plate 4| (Fig. 4) of the accumulator carriage. The pins 5| engage the slots 83 of the bar 49 and the slots 80 of the bar 50. Also the pin 8| of the bar 50 co-operates with the slot 83 of the bar 49.

In the cover plate of the accumulator. slide there is formed, as shown in Fig. 1, a slot 80a which is an inverted duplicate of the slot 30, through which slot 80a extends a pin 5011 fixed in the bar 55 and having a head 5%. In Fig. 1 the pin 50a stands at the left hand end of the slot 80a and by means of the head 5% it can be moved until the pin stands in the right hand end of the slot 8011, the bar being. guided by its slots 80 engaging the pins 5!. The bar 50 can thus be set in two different positions. If the pin 50 stands in the left end of the slot 8011., the cam mechanism (IQ- 83) is so prepared that it brings the bevel gears '42, 45 into mesh for additive right end of the slot "r the cam mechanism is isoprepared that a subtractive transfer occurs.

By shifting the-bar 50 a bar 15 is simultaneously shifted means of the cross-bars 14a, whereby,

as hereafter described, the tens-carrying devices are set for additive or subtractive transfer. The setting of the bar 50, and therefore the preparation of the product transfer mechanism for additive or subtractive transfer, always takes place while the machine is not operating, that is before the beginning of a multiplication. v

If the bar 50, as shown in Figs. 1, 18a, 18b, stands in its left end position, the pin 8| of the bar 50 will stand in the left part of the slot portion 82a. If the bar is is now moved somewhat to the left, the bar 58 remaining stationary, the bar 69 will be shifted slightly upwardly by means of the pin 51 and the slot portion 82a (Fig. 181)) and carries with it the double bevel gears 55, whereby the bevel gears 42, 45 come into mesh with each other and the number rolls 5?, M are coupled for additive transfer of products. The bar 59 in this movement is guided by the slots 83a and the pins. 5!.

If the bar 5!! stands in its right end position, the pin 8! of the bar 50, as shown in Fig. 1'7, will stand in the left part of the slot portion 82b, and when the bar 49 is shifted to the left it is moved downwards by the pin 8! and slot portion 521; (Fig. 17b), bringing the bevel gears 55, 52 into mesh for subtractive transfer of products. The bar 35 in this movement is guided by the slots 83b and the pins 5!.

The pins 8! and the slot portions 82a. and 82b thus form the most essential parts of the cam mechanism. I

The bar 69 is actuated by a slide 52 (Figs. 1, 3, 4, 7, 8) having ramps 52b extending into the path of movement of the slide 25b which is 1 23 (Figs. 3 and 5), is rocked once to and fro about the pivot 250. In the first half turn of the eccentric the lever rocks counter-clockwise, and this movement is designated as the product transfer stroke. In the second half turn of the eccentric 23 the lever 25 rocks back to its initial position, which movement is designated as the tenscarrying stroke.

At the beginning of the product transfer stroke the slide 251) contacts with the ramp 52b.

The slide 52 and the bar 59 are accordingly shifted to the left (Figs. 1 and 7) whereby, as already stated, the bevel gears 42 and 45 will be put into mesh with one another. The number rolls 5'! of the product mechanism 28 are then in connection with the number rolls 45 of the totalizing register 21, by means of shaft E0, bevel gears 38 and 39, shaft 35, reverse gears 42 and i5 and shaft 48.

Shortly before the slide 52 which. is moved by the transfer lever 25 reaches its left hand end position (Figs. 1 and '7) a latch 54, which is pivot- I have thus been connected together in pairs, the

arm 250 (Fig. 3) of the lever 25 will strike the arm 30a of the clearing lever 30, which moves the clearing rack bar 32 by means of the shifting element 3|. The clearing rack bar in turn engages into the zero setting wheels 29 and sets the number wheels 51 of the product register 28 to zero. Inasmuch as the number rolls of the registers 21 and 28 are connected in pairs, simultaneously with the zero setting of the product register, the transfer of the numerical values contain'ed therein takes place into the totalizing register.

After carrying out the result transfer the lock 54 is released by the clearing lever 30, which carries out a further supplemental stroke after the clearing, the lever 30 strikes against the edge 54a of the lock 54 and releases it by turning it around its pin 54b whereby the slide 52 and the bar 49 are again moved under spring action to the right (Figs. 1 and '7), the meshing of the bevel gears 42 and 45, and the connecting of the number rolls 44 and 51, are consequently eliminated.

If a number roll 44 of the totalizing register 21 is turned from nine to zero" or vice versa, thus if a tens transfer becomes necessary to the number roll of the next higher place, then the tens setting finger 59 (Figs. 10 and 11) of the number roll which is turned from nine to zero will force a pawl 60 downwards, and this in turn presses upon the arm Gla (Figs. 10, 111 and 13) of a further pawl 61 belonging to the number roll of the next higher place of the register and shifts the latter to such extent that a latch 54 rotatable about 62 and actuated by the spring 63 (Fig. 14) will grip with its bent portion 64a under the lug Bib of the pawl 6| and hold the latter tight in the swung position. Thereby the tens transfer is prepared for. r

The impulses of power and movement necessary for carrying out the tens transfers are derived from the transfer lever 25 by means of the segment 65 (Figs. 7 and 8), the gear wheel 86, the free running clutch 61 and the shaft 68. The free running clutch 61 provides that the tens shifting shaft 68 may not be turned during the result transfer stroke of the lever 25. If on the other hand during the tens carrying stroke the lever 25 and the toothed segment 65 arranged upon the same swing back (that is, to the right inFig. 8), then the free running clutch 61 will become engaged and the tens shifting shaft will be rotated. A number of lugs 69 (Figs. 9, 11 and 13) are attached to the tens shifting shaft 68, and staggered with, respect to one another, correspending in number to the number of number rolls, which upon rotary movement of the shaft 68 press against the bent tongues Illa (Figs. 10, 12 and 13) corresponding to them, of the tens shifting flaps I0, and thereby move the latter downwardly. If now a tens transfer has been prepared for in one place of the totalizing register, that is, if the pawl 6| has been swung by the tens shifting finger 59 of the next lower number roll with the assistance of a pawl 60, then upon the downward movement of the tens shifting flap 10 produced by the tens shifting lug 69, the shifting element "H hinged thereto and hanging downwardly will be forced by the incline 61d (Figs. 11 and 13) of the pawl H together with one of s the two projections Ha. or 1 lb, into a tooth space of the tens shifting wheel 41 lying opposite the same, so that upon further downward movement of the tens shifting flap Hi, H the gear wheel 41 will be turned further a space corresponding to one unit, together with the corresponding number wheel 44. Ifthe tens shifting flap 10, H has reached such a depressed out, then the notch I la will be positioned in front of the lug Slc of the pawl 6|, so that the shifting element H which has been pushed forward by the incline Gld will swing back to a certain extent and will become positioned in a lower strip below the lug Sic, whereby the shifting element BI is locked in its lowermost position.

In those places of the totalizing register wherein no tens transfer has been prepared for, the tens shifting flap will be depressed inactively by the corresponding tens shifting lugs, but will immediately thereafter again jump back into a normal position due to the tension of the spring I3 (Fig.7). The bar 14 (Figs. '7, 11, and 13) upon which are set all the tens shifting flaps 10 together with the shifting elements II, is shiftable longitudinally, and may be set into two positions. In one position the projection Ha will come into engagement with the tens shifting wheel 41, and in the other position the projection 'Hb will come into such engagement. The

tens shifting wheel and the number roll will be forced in one case in the additive direction and in the other case in the subtractive direction. The bar 14 is by a cross beam 14a (Fig. 7) rigidly connected to the bar 50, by the longitudinal shifting of which the cam mechanism, which brings the bevel gears 42 and 45 into and out of engagement with one another, is set for additive or subtractive transfer. The cam mechanism 49 and 50, and the tens shifting means are therefore always reversed simultaneously.

When the tens shifting has been completed and the transfer lever 25 again approaches its initial position, the'gear segment 65 by means of the lug 6511 will swing out of position an angle lever 15 (Figs. 7 and 8). Thereby the bar 16 (Figs. 7, 9 and 14) will be so shifted that by abutting with its tongues 11 against the projections 64b of the locking pawls 64, it takes the latter along. The locking of the pawls 6| is thereby eliminated, and the pawls 60 are allowed to return from their preparing position to their initial position. All the remaining tens shifting means also return to their initial positions together with them.

The entire clearing and transfer procedure takes place as follows: During the first part of the rotation of the cam disc 23 the lower end of the transfer lever 25 is gradually forced to the right (Fig. 3) whereby the transfer lever 25 first forces the slide 52 and the bar 49 to the left (Figs. 1 and '7) by means of the slide 25b secured to its upper end against the incline 522). Thereby the product register 28 becomes connected. with the totalizing register 21. Upon further swinging the transfer lever 25 will become positioned with a projection 25a against one arm 30a of the clearing lever 30 and will depress the latter, whereby the clearing of the product register 28 and thereby also the transfer of the result into the totalizing register will be carried out. Short- 1y before the completion of the first half rotation of the cam disc 23 the clearing lever 30 will arrive with its other arm 30b against the locking lever 54, will lift the latter, thus unlocking the bar 49 and thereby also releasing the connection between the number rolls of the result and totalizing registers through the bevel gears 42 and 45. During the second half of the rotation of the cam disc all the elements return to their original positions, and thereby the gear segment 55 will move the shaft 68 which drives the tens transfer mechanism of the totalizing register.

While the cam disc 23 is approaching the completion of an entire rotation, a lug Ila provided upon the locking element H, and abutting against the projection 9d of the slide 9 will shift the locking slide 9 in such manner that the same will hold the locking element ll tight and will eliminate the locking of the disc l2. Thereby all the clearing and transfer elements for the registers are locked and the motion transmission from the motor to the main drive shaft 15 is freed, so that now, after completion of the clearing and the transfer of the preceding product into the totalizing register, the next multiplication may be carried out.

The shaft I6 is the main drive shaft of the calculating machine.

By retraction of the locking slide 9 and intermediate element ill with its link H, the motor key I will not be set back, for the reason that upon depressing the key l its extension la will slide off from the head of the link ll after the key has swung the element Ill through a certain distance, and will thus move out of the path of movement of the parts Ill and N, (Fig. 6). After completing the multiplication, the key which will be freed from the multiplication device, not shown, and the arm la will again be set under the head of the link I! by a swinging motion of the latter.

The slide b and the rack segment 65 are connected with the lever 25 by screws 2511. The slide 25b is guided by the slot 25g on this screw and is drawn upwardly by the spring 25a In the return stroke of the lever 25 (tens-carrying stroke) the pin 25} of the slide 25b strikes the under side of the slide 52 and is forced upwardly. The slide 52 therefore is not affected by the tenscarrying stroke.

' As will be understood from the preceding description, the differential gear it functions as a change-over mechanism for transmitting the rotation of the motor driven shaft 8a first to the shaft l8 actuating the result transfer mechanism and then to the main drive shaft 16 of the calculating machine.

The slide 9 serves as a control member which upon depression of the motor key I controlling the motor drive for multiplication is so shifted that the change-over mechanism l3 transmits the motion of the motor driven shaft 8a to the shaft l8 of the result transfer mechanism. After this shaft I8 almost completes its first revolution, a shifting member Ila, operated thereby, so sets the control member 9 that the changeover mechanism l3 transmits the motion of the motor driven shaft 811 to the main drive shaft l6 of the machine.

aesaaee I claim as my invention:-

1. A calculating machine comprising calculat ister; means for transferring products from the product register to the total register; motor drive means including connections to both the calculating mechanism and the product transfer means; reversible means movable in one direction to render effective only the connections to the transfer means and in the other direction to render effective only the connections to the calculating mechanism; a key operable to move said reversible means in the first direction; and means for automatically moving said reversible means in the other direction upon completion of a transfer as a consequence of said key operation. I

2. A calculating machine comprising an automatic multiplying mechanism, a product register, a total register, means for effecting transfer of a product from the product register to the total register, a motor drive including connections between the motor and both the multiplying mechanism and the transfer means, key controlled means for rendering eiTective the connections of the motor to the transfer means and simultaneously rendering ineffective the connections of the motor to the multiplying mechanism, and means operated automatically only upon completed transfer of a product by said key controlled means to render effective the connections of the motor to the multiplying mechanism and simultaneously render ineffective the connections to the transfer means,

3. In an automatic multiplying machine comprising calculating mechanism, a product register, a total register, means for transferring products from the products register to the total register, a motor, and a key controlling the switching in of the motor to perform multiplication;

the parts of the transmission mechanism connected with the calculating mechanism upon completion of a transfer resulting from said key operation.

AUGUST KO'I'I'MANN. 

